US EPA

The Annual Health Effects Summary Tables (HEAST) are for use at both Superfund and RCRA sites. It is most recently maintained by the Environmental Protection Agency's Office of Radiation and Indoor Air (ORIA) and provides the most current comprehensive listing of provisional risk assessment information relative to oral and inhalation routes of exposure for chemicals. The radionuclide table, formerly known as HEAST Table 4, lists ingestion, inhalation and external exposure cancer slope factors (risk coefficients for total cancer morbidity) for radionuclides in conventional units of picocuries (pCi).

In the documents linked from this site, slope factors were calculated by EPA to assist HEAST users with risk-related evaluations and decision-making at various stages of the remediation process. A companion user's guide (available from the 2001 update website) describes the derivation of the slope factors in the HEAST Table 4, information about the table, and contact information.

U.S. EPA. Health Effects Assessment Summary Tables (Heast). U.S. Environmental Protection Agency, Washington, D.C., 1997.

Please contact Dave Crawford for the most up-to-date status on the HEAST tables.

Note: As of March 1998 the most current document numbers were:

NTIS ORDER NO.: PB97-921 199
OWSER # 9200.6-303 (97-1)
EPA # 540-R-97-036